<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

/**
 * ThinkPHP系统异常基类
 * @category   Think
 * @package  Think
 * @subpackage  Core
 * @author    liu21st <liu21st@gmail.com>
 */
class ThinkException extends Exception {

	/**
	 * 异常类型
	 * @var string
	 * @access private
	 */
	private $type;

	// 是否存在多余调试信息
	private $extra;

	/**
	 * 架构函数
	 * @access public
	 * @param string $message  异常信息
	 */
	public function __construct($message,$code=0,$extra=false) {
		parent::__construct($message,$code);
		$this->type = get_class($this);
		$this->extra = $extra;
	}

	/**
	 * 异常输出 所有异常处理类均通过__toString方法输出错误
	 * 每次异常都会写入系统日志
	 * 该方法可以被子类重载
	 * @access public
	 * @return array
	 */
	public function __toString() {
		$trace = $this->getTrace();
		if($this->extra)
		// 通过throw_exception抛出的异常要去掉多余的调试信息
		array_shift($trace);
		$this->class    =   isset($trace[0]['class'])?$trace[0]['class']:'';
		$this->function =   isset($trace[0]['function'])?$trace[0]['function']:'';
		$this->file     =   $trace[0]['file'];
		$this->line     =   $trace[0]['line'];
		$file           =   file($this->file);
		$traceInfo      =   '';
		$time = date('y-m-d H:i:m');
		foreach($trace as $t) {
			$traceInfo .= '['.$time.'] '.$t['file'].' ('.$t['line'].') ';
			$traceInfo .= $t['class'].$t['type'].$t['function'].'(';
			$traceInfo .= implode(', ', $t['args']);
			$traceInfo .=")\n";
		}
		$error['message']   = $this->message;
		$error['type']      = $this->type;
		$error['detail']    = L('_MODULE_').'['.MODULE_NAME.'] '.L('_ACTION_').'['.ACTION_NAME.']'."\n";
		$error['detail']   .=   ($this->line-2).': '.$file[$this->line-3];
		$error['detail']   .=   ($this->line-1).': '.$file[$this->line-2];
		$error['detail']   .=   '<font color="#FF6600" >'.($this->line).': <strong>'.$file[$this->line-1].'</strong></font>';
		$error['detail']   .=   ($this->line+1).': '.$file[$this->line];
		$error['detail']   .=   ($this->line+2).': '.$file[$this->line+1];
		$error['class']     =   $this->class;
		$error['function']  =   $this->function;
		$error['file']      = $this->file;
		$error['line']      = $this->line;
		$error['trace']     = $traceInfo;

		// 记录 Exception 日志
		if(C('LOG_EXCEPTION_RECORD')) {
			Log::Write('('.$this->type.') '.$this->message);
		}
		return $error ;
	}
}